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MORTALITY IN APPLE MEALYBUG, PHENACOCCUS ACERIS (HOMOPTERA: COCCIDAE), POPULATIONS IN NOVA SCOTIA1

Published online by Cambridge University Press:  31 May 2012

Hari S. Chachoria
Hari S. Chachoria
Affiliation:
Research Station, Canada Department of Agriculture, Kentville, Nova Scotia
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Extract

The apple mealybug, Phenacoccus aceris Sig., has been a pest of apple trees periodicallv since an outbreak was reported by Gilliatt in 1935. The writer investigated mortality in its population during the summer of 1966 in connection with the current sporadic outbreak in the Annapolis Valley. Decline of outbreaks was attributed bv Marshall and Pickett (1944) to attacks by the parasite Allotropa utilis (Mues.) (Hymenoptera: Platygasteridae), and the abundance of this parasite in the current upsurge in mealybugs suggests it is an important factor. Mr. K. H. Sanford (personal communication) estimated approximately 58% of the mealybugs in the winter of 1965–1966 and about 80% in the winter of 1966–1967 were parasitized by this species.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 7 , July 1967 , pp. 728 - 730
Copyright
Copyright © Entomological Society of Canada 1967

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References

Gilliatt, F. C. 1935. A mealybug, Phenacoccus aceris Signoret, a new apple pest in Nova Scotia. Can. Ent. 67: 161–164.CrossRefGoogle Scholar
Gilliatt, F. C. 1936. Observations on the mealybug, Phenacoccus aceris Sig. Can. Ent. 68: 133.CrossRefGoogle Scholar
Gilliatt, F. C. 1939. The life history of Allotropa utilis Mues., a hymenopterous parasite of the orchard mealybug in Nova Scotia. Can. Ent. 71: 160–163.CrossRefGoogle Scholar
Marshall, J., and Pickett, A. D.. 1944. The present status of the apple mealybug, Phenacoccus aceris Sig., in British Columbia and Nova Scotia. Can. Ent. 76: 19.CrossRefGoogle Scholar